EP 0146486 A3 19860611 - METHOD AND APPARATUS FOR CONTROLLING A REFRIGERANT EXPANSION VALVE IN A REFRIGERATION SYSTEM
Title (en)
METHOD AND APPARATUS FOR CONTROLLING A REFRIGERANT EXPANSION VALVE IN A REFRIGERATION SYSTEM
Publication
Application
Priority
US 56289683 A 19831219
Abstract (en)
[origin: EP0146486A2] A refrigeration system is disclosed which may have multiple compression and condenser stages, in which an electronic refrigerant expansion valve is controlled by the digital output of a microcomputer which adjust the expansion valve in response to a valve change signal which is a function of a fraction of the deviation of the senses refrigerant superheat from a desired superheat added to a multipl of the computed rate of change of the refrigerant superheat.
IPC 1-7
IPC 8 full level
F25B 1/00 (2006.01); F25B 41/06 (2006.01); F25B 49/00 (2006.01); G05D 23/24 (2006.01)
CPC (source: EP KR US)
F25B 41/35 (2021.01 - EP KR US); F25B 49/00 (2013.01 - KR); G05D 23/1931 (2013.01 - EP US); G05D 23/24 (2013.01 - EP US); F25B 2600/21 (2013.01 - EP US); F25B 2600/2513 (2013.01 - EP US); Y02B 30/70 (2013.01 - EP US)
Citation (search report)
- [A] DE 3220420 A1 19831215 - WESTFAEL ELEKT WERKE [DE]
- [A] EP 0069996 A1 19830119 - SYSTEM HOMES KK [JP], et al
- [AP] FR 2539855 A1 19840727 - COMP GENERALE ELECTRICITE [FR]
- [AP] GB 2130747 A 19840606 - MITSUBISHI ELECTRIC CORP
- [A] US 4362027 A 19821207 - BARBIER WILLIAM J
- [A] US 3577743 A 19710504 - LONG JOSEPH N
- [A] FR 2375559 A1 19780721 - BORG WARNER [US]
Designated contracting state (EPC)
CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0146486 A2 19850626; EP 0146486 A3 19860611; AU 3331484 A 19850627; AU 550195 B2 19860306; BR 8406428 A 19851015; CA 1233656 A 19880308; DK 590784 A 19850620; DK 590784 D0 19841211; EG 16951 A 19920630; IN 163332 B 19880910; JP H0348428 B2 19910724; JP S60162170 A 19850823; KR 850004323 A 19850711; KR 890003630 B1 19890928; MX 162081 A 19910325; MY 100907 A 19910516; PH 22189 A 19880628; US 4523435 A 19850618
DOCDB simple family (application)
EP 84630193 A 19841212; AU 3331484 A 19840919; BR 8406428 A 19841214; CA 467585 A 19841113; DK 590784 A 19841211; EG 79284 A 19841219; IN 840CA1984 A 19841205; JP 26551984 A 19841218; KR 840008118 A 19841219; MX 20381184 A 19841219; MY PI19872390 A 19870930; PH 31587 A 19841217; US 56289683 A 19831219